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Finding the Fourth Proportional to 62,886.74, 86,758.54 and 40,220.50

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Solution

The fourth proportional to 62,886.74, 86,758.54 and 40,220.50 is: 55,488.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,886.74 : 86,758.54 = 40,220.50 : x
  2. Step 2: Convert to fraction form
    62,886.74/86,758.54 = 40,220.50/x
  3. Step 3: Cross multiply
    62,886.74x = 86,758.54 × 40,220.50
  4. Step 4: Simplify right side
    62,886.74x = 3,489,471,858.07
  5. Step 5: Solve for x
    x = 3,489,471,858.07/62,886.74
  6. Step 6: Final answer
    x = 55,488.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.